The bacteria and plants were associated to remove diesel oil pollutants from soil.Three efficiently degrading bacteria(named strains Q10,Q14 and Q18,respectively) were isolated.Two plants(alfalfa and Indian mustard) w...The bacteria and plants were associated to remove diesel oil pollutants from soil.Three efficiently degrading bacteria(named strains Q10,Q14 and Q18,respectively) were isolated.Two plants(alfalfa and Indian mustard) were selected to form the association.Biodegradation of diesel oil pollutants in soil was accelerated by bacteria-plants association.The main results are summarized as follows.The plants-bacteria association was more effective in biodegradation of diesel oil pollutants in soil than in respective experiments carried out with plants or bacteria alone.Strain Q18-Indian mustard association resulted in the maximum diesel oil reduction(69.18%).The activities of catalase and polyphenol oxidase in soil were enhanced and microbial populations in soil,especially in rhizosphere,were also stimulated in the treatment of bacteria-plant association.Overall,the soil conditions might be improved by alfalfa or Indian mustard to benefit the growth of bacteria,which resulted in degradation of diesel oil pollutants more effective by the bacteria-plant association.The bacteria-plants association may be a better approach to the removal of diesel oil pollutants from soil.展开更多
在已有研究中,水体中污染物降解基本不考虑泥沙的影响,考虑河流泥沙自身特性研究天然河流细颗粒泥沙对水沙体系中污染物生物降解影响的报道还不多见。以粒径小于0.008 mm和0.02 mm 2个粒径组的天然河流细颗粒泥沙为试验材料,以经稀释的...在已有研究中,水体中污染物降解基本不考虑泥沙的影响,考虑河流泥沙自身特性研究天然河流细颗粒泥沙对水沙体系中污染物生物降解影响的报道还不多见。以粒径小于0.008 mm和0.02 mm 2个粒径组的天然河流细颗粒泥沙为试验材料,以经稀释的生活污水模拟天然污染水体,通过试验研究了水沙体系中污染物生物降解过程,从含沙量、泥沙粒径等方面分析得出了河流细颗粒泥沙对污染物生物降解影响规律。结果表明水沙体系中低浓度污染物的好氧生物降解符合一级反应动力学过程,但泥沙的存在对污染物的降解具有一定的促进作用。含沙体系中污染物降解速率大于不含沙体系中的降解速率,其降解速率常数随含沙量的增大而增大,半衰期则随含沙量的增大而缩短。此外,对细颗粒河流泥沙而言,泥沙粒径对水沙体系中污染物降解过程没有显著影响。展开更多
基金supported by the Natural Science Foundation of China (NSFC) (No. 40603017)the National Key Scientific and Technological Project of China (No. 2008ZX07207-007)
文摘The bacteria and plants were associated to remove diesel oil pollutants from soil.Three efficiently degrading bacteria(named strains Q10,Q14 and Q18,respectively) were isolated.Two plants(alfalfa and Indian mustard) were selected to form the association.Biodegradation of diesel oil pollutants in soil was accelerated by bacteria-plants association.The main results are summarized as follows.The plants-bacteria association was more effective in biodegradation of diesel oil pollutants in soil than in respective experiments carried out with plants or bacteria alone.Strain Q18-Indian mustard association resulted in the maximum diesel oil reduction(69.18%).The activities of catalase and polyphenol oxidase in soil were enhanced and microbial populations in soil,especially in rhizosphere,were also stimulated in the treatment of bacteria-plant association.Overall,the soil conditions might be improved by alfalfa or Indian mustard to benefit the growth of bacteria,which resulted in degradation of diesel oil pollutants more effective by the bacteria-plant association.The bacteria-plants association may be a better approach to the removal of diesel oil pollutants from soil.
文摘在已有研究中,水体中污染物降解基本不考虑泥沙的影响,考虑河流泥沙自身特性研究天然河流细颗粒泥沙对水沙体系中污染物生物降解影响的报道还不多见。以粒径小于0.008 mm和0.02 mm 2个粒径组的天然河流细颗粒泥沙为试验材料,以经稀释的生活污水模拟天然污染水体,通过试验研究了水沙体系中污染物生物降解过程,从含沙量、泥沙粒径等方面分析得出了河流细颗粒泥沙对污染物生物降解影响规律。结果表明水沙体系中低浓度污染物的好氧生物降解符合一级反应动力学过程,但泥沙的存在对污染物的降解具有一定的促进作用。含沙体系中污染物降解速率大于不含沙体系中的降解速率,其降解速率常数随含沙量的增大而增大,半衰期则随含沙量的增大而缩短。此外,对细颗粒河流泥沙而言,泥沙粒径对水沙体系中污染物降解过程没有显著影响。
